/*
 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
 *
 *
 *
 *
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 */

package com.sun.corba.se.impl.orbutil;

import java.security.PrivilegedAction;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;
import java.util.List;
import java.util.ListIterator;
import java.util.Set;
import java.util.Map.Entry;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Enumeration;
import java.util.Properties;
import java.util.IdentityHashMap;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.math.BigInteger;
import java.math.BigDecimal;

public final class ObjectUtility {

  private ObjectUtility() {
  }


  /**
   * If arr1 and arr2 are both arrays of the same component type,
   * return an array of that component type that consists of the
   * elements of arr1 followed by the elements of arr2.
   * Throws IllegalArgumentException otherwise.
   */
  public static Object concatenateArrays(Object arr1, Object arr2) {
    Class comp1 = arr1.getClass().getComponentType();
    Class comp2 = arr2.getClass().getComponentType();
    int len1 = Array.getLength(arr1);
    int len2 = Array.getLength(arr2);

    if ((comp1 == null) || (comp2 == null)) {
      throw new IllegalStateException("Arguments must be arrays");
    }
    if (!comp1.equals(comp2)) {
      throw new IllegalStateException(
          "Arguments must be arrays with the same component type");
    }

    Object result = Array.newInstance(comp1, len1 + len2);

    int index = 0;

    for (int ctr = 0; ctr < len1; ctr++) {
      Array.set(result, index++, Array.get(arr1, ctr));
    }

    for (int ctr = 0; ctr < len2; ctr++) {
      Array.set(result, index++, Array.get(arr2, ctr));
    }

    return result;
  }

}
